JP6192975B2 - Roller bearing - Google Patents

Description

  The present invention relates to a roller bearing having a conical or cylindrical hollow roller.

  In a roller bearing in which a plurality of hollow rollers are incorporated between a raceway surface formed on the inner periphery of the outer ring and a raceway surface formed on the outer periphery of the inner ring, the hollow roller is usually provided by each of a plurality of pins provided on the cage. Is supported rotatably.

  For example, in the roller bearing described in Patent Document 1, a plurality of pins are provided at equal intervals in the circumferential direction between a pair of annular plates opposed to each other with a gap slightly larger than the axial length of the hollow roller, A pair of annular plates are connected to each other by the plurality of pins to form a cage, and the hollow rollers are rotatably supported by the plurality of pins.

JP 2005-155789 A

  By the way, in the roller bearing retainer described in Patent Document 1, both end portions of a plurality of pins are inserted into pin holes formed in a pair of annular plates, and the outer peripheral portions on both end surfaces of each pin are annular. Since the pair of annular plates are connected to each other by welding to the plates, there are a large number of welded portions, so that it takes a lot of work to manufacture and there is a problem that the quality is likely to vary.

  An object of the present invention is to make it possible to easily manufacture a cage for roller bearings of uniform quality regardless of the skill of an operator.

  In order to solve the above problems, in the present invention, a plurality of hollow rollers are incorporated between a raceway surface formed on the inner periphery of the outer ring and a raceway surface formed on the outer periphery of the inner ring, and the hollow rollers are held by a cage. In the roller bearing, the retainer has a pair of annular plates disposed on both sides of the hollow roller, and a pin that is inserted through the center hole of the hollow roller and connects the pair of annular plates to each other. The pin is inserted only into each of the center holes in several hollow rollers selected from the plurality of hollow rollers to connect the pair of annular plates to each other, and between the opposed portions of the adjacent hollow rollers in the circumferential direction. A structure incorporating spacers whose both sides are arc surfaces along the outer periphery of the hollow roller is adopted.

  As described above, by inserting the pin only through the center hole of several hollow rollers selected from a plurality of hollow rollers, the outer peripheral portion of the end surface of the pin is welded to the annular plate and the pair of annular plates are connected to each other When forming the cage, the number of welded portions can be greatly reduced, the cage can be easily formed, and a cage with uniform quality can be obtained.

  In addition, by incorporating a spacer between adjacent hollow rollers, a pocket that can accommodate the roller is formed between adjacent spacers, and the roller can be supported by each pocket so as to roll. .

  For this reason, it is possible to employ a solid roller as the remaining rollers other than the selected several hollow rollers, and in the adoption of the solid roller, it is possible to obtain a roller bearing having a large load capacity. it can.

  Here, by providing projections at both ends of the spacer in the axial direction, and fitting the projections into annular grooves formed on the opposing surfaces of the pair of annular plates, It is possible to obtain a roller bearing that prevents movement in the direction and has a small torque loss.

  In the roller bearing according to the present invention, the pin for connecting the pair of annular plates to each other may be a bolt or a stepped pin in which a small-diameter screw shaft portion is provided at both ends of the straight shaft portion. .

  When a bolt is used as a pin, the screw shaft portion of the bolt is inserted into a hollow roller from a pin hole formed in one annular plate and inserted into a pin hole provided in the other annular plate, and the other A convex nut provided with a tapered boss portion at an eccentric position with respect to the center of the end surface at the tip of the screw shaft portion protruding outward from the outer surface of the annular plate, and a tapered concave portion on the center position of the end surface A pair of annular plates can be connected to each other by screw-engaging the formed concave nut so that the tapered boss fits into the tapered concave.

  When a hexagonal bolt is used, the screw shaft of the hexagonal bolt is inserted into the hollow roller from the pin hole formed in one annular plate and screwed into the screw hole provided in the other annular plate. The washer is assembled between the head of the bolt and the one annular plate, and the bent piece formed on the washer is engaged with the peripheral surface of the one annular plate to prevent rotation, and is formed on the outer periphery of the washer. By bending the raised claws, the pair of annular plates can be connected to each other by engaging the claws with the head.

  In the use of the bolt as described above, the welding work can be eliminated, so that the cage can be formed more easily and a cage with excellent quality can be obtained. In addition, the wedge nut by the fitting of the tapered concave portion and the tapered boss portion can hold the convex nut and the concave nut in a locked state, so that the bolt does not loosen and has a superior shape retaining property. Can be obtained.

  Furthermore, since the bolt can be removed by removing the convex nut and the concave nut or by releasing the engagement with the head by bending back the claw portion of the washer, maintenance of the cage can be made possible.

  On the other hand, when a stepped pin is adopted as the pin, the stepped pin is inserted into the hollow roller from the pin hole formed in one annular plate and inserted into the pin hole provided in the other annular plate, A convex nut provided with a tapered boss portion at an eccentric position with respect to the center of the end surface on each of the screw shaft portions located outward from the respective outer surfaces of the annular plate, and a tapered shape on the center position of the end surface A pair of annular plates can be connected to each other by screw-engaging the recessed nut formed with the recessed portion so that the tapered boss portion fits into the tapered recessed portion.

  Further, when adopting a stepped pin, the stepped pin is inserted into a hollow roller from a pin hole formed in one annular plate and screwed into a screw hole provided in the other annular plate, A convex nut provided with a tapered boss portion at an eccentric position with respect to the center of the end surface on the screw shaft portion located outward from the outer surface of one annular plate, and a tapered concave portion formed on the center position of the end surface A pair of annular plates can be connected by screw-engaging the recessed nut thus formed so that the tapered boss portion fits into the tapered recessed portion.

  Even with the use of the stepped pin as described above, the welding work can be made unnecessary as in the case of the use of the bolt described above, so that the cage can be formed more easily and has excellent quality. Can be obtained. In addition, it is possible to obtain a cage excellent in shape retention that enables maintenance.

  In the present invention, as described above, by inserting the pin only through the center holes of several hollow rollers selected from a plurality of hollow rollers, the outer peripheral portion of the end surface of the pin is welded to the annular plate and a pair of annular rollers When forming the cage that connects the plates to each other, the number of welding points can be greatly reduced, and the cage can be easily formed, and a cage with uniform quality can be obtained.

  In addition, by adopting hexagon bolts or stepped pins with small diameter screw shafts at both ends of the straight shaft as pins, a pair of annular plates are connected and held together by screwing a convex nut or concave nut Since the vessel can be formed, welding is not required, and the cage can be formed more easily.

Partially cutaway front view showing an embodiment of a roller bearing according to the present invention An enlarged view showing a part of FIG. Partially cutaway plan view with the outer ring of FIG. 2 removed Sectional view along line IV-IV in FIG. Sectional view along line VV in FIG. Sectional view along line VI-VI in FIG. Sectional drawing which shows the other example of connection of an annular plate Sectional drawing which expands and shows a part of FIG. Sectional drawing which shows the further another example of the connection of an annular plate Left side view of FIG. FIG. 9 is a perspective view showing a state before the washer shown in FIG. 9 is assembled. Sectional drawing which shows the further another example of the connection of an annular plate Sectional drawing which shows the further another example of the connection of an annular plate

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 6 show a tapered roller bearing as a roller bearing according to the present invention. The tapered roller bearing includes an outer ring 1, an inner ring 11, a plurality of tapered hollow rollers 21 incorporated between the outer ring 1 and the inner ring 11, and a cage 31 that holds the hollow rollers 21.

  The outer ring 1 has a conical raceway surface 2 on the inner periphery. On the other hand, the inner ring 11 has a conical raceway surface 12 on the outer periphery, and a large brim 13 that guides the large end surface 22 of the tapered roller 21 is provided at the large diameter end of the raceway surface 12. Further, a small collar 14 for guiding the small end surface 23 of the tapered roller 21 is provided at the small diameter end of the raceway surface 12.

  The cage 31 includes a pair of annular plates 32 and 33 having different diameters disposed on both sides of the plurality of hollow rollers 21, a pin 34 that connects the pair of annular plates 32 and 33 to each other, and adjacent hollow rollers 21. It consists of a spacer 35 incorporated in between.

  The pair of annular plates 32 and 33 have an annular groove 36 on the opposing inner surface. The pin 34 is a straight pin. The pin 34 is inserted into the center hole 24 of several hollow rollers 21 selected from the plurality of hollow rollers 21. In FIG. 1, four hollow rollers 21 arranged at intervals of 90 ° from a plurality of hollow rollers 21 are selected, pins 34 are inserted into the respective center holes 24 of the four hollow rollers 21, Both ends of the pin 34 are connected to a pair of annular plates 32 and 33.

  When the pin 34 is connected to the pair of annular plates 32 and 33, here, as shown in FIG. 4, a pair of pin holes 37 are coaxially arranged opposite to each of the annular plates 32 and 33, and 90 ° in the circumferential direction. 4 sets are formed at intervals, and both end portions of the pins 34 are fitted into the pair of opposed pin holes 37 of each set, and the outer peripheral portions of both end surfaces of the respective pins 34 are welded to the annular plates 32 and 33. ing. In the figure, reference numeral 38 denotes a welded portion.

  The spacer 35 has a circular arc surface 35 a along the outer periphery of the hollow roller 21 on both sides, and is provided with square protrusions 35 b at both ends in the axial direction. The protrusions 35 b are annular grooves 36 of the annular plates 32 and 33. It is prevented from falling out in the radial direction by being fitted inside.

  As shown in the embodiment shown in FIGS. 1 to 6, the pins 34 are inserted only into the center holes 24 of the four hollow rollers 21 selected from the plurality of hollow rollers 21, and both ends of the pins 34 are paired annularly. Each of the central holes 24 of the plurality of hollow rollers 21 is formed by fitting into pin holes 37 formed in the plates 32 and 33 and welding the outer peripheral portions of both ends of each pin 34 to form the cage 31. Compared with the case where the pin 34 is inserted into the outer peripheral portion of each pin 34 and the outer peripheral portions of both ends of the pin 34 are welded to the annular plates 32, 33, the number of welding points is significantly reduced, and the cage 31 can be easily formed. In addition, the cage 31 having uniform quality can be obtained.

  Further, a spacer 35 is incorporated between the adjacent hollow rollers 21, and the protrusions 35 b provided at both ends in the axial direction of the spacer 35 are fitted into the annular grooves 36 provided on the opposing surfaces of the annular plates 32 and 33. As shown in FIG. 2, pockets 39 that can accommodate the hollow rollers 21 can be formed between the adjacent spacers 35, and the hollow rollers 21 can be freely rolled by the respective pockets 39. Can be held in.

  Thus, since the other hollow rollers 21 except for the selected several hollow rollers 21 are supported by the pockets 39 formed by the spacers 35, the hollow rollers 21 are replaced with solid tapered rollers. It is possible to obtain a tapered roller bearing with a large load capacity when incorporating a solid tapered roller.

  In FIG. 4, a straight pin is used as the pin 34 to connect the pair of annular plates 32 and 33, but the pin 34 is not limited to a straight pin. 7 to 13 show other examples of the pins 34.

  In the example shown in FIGS. 7 and 8, a bolt 40 with a hexagonal hole is employed as the pin 34. In this case, the screw shaft portion 41 of the bolt 40 as a pin is inserted from the pin hole 37 formed in the large-diameter side annular plate 32 into the sleeve 42 inserted into the center hole 24 of the hollow roller 21, and the small-diameter side annular plate. A taper-shaped boss portion 44 is provided at an eccentric position with respect to the center of the end surface at the tip end portion of the screw shaft portion 41 that is inserted through a pin hole 37 provided in the outer periphery 33 and protrudes outward from the outer surface of the small-diameter annular plate 33. A pair of a protruding nut 43 and a recessed nut 45 having a tapered recess 46 formed on the center position of the end face are screw-engaged so that the tapered boss 44 is fitted to the tapered recess 46. The annular plates 32 and 33 are connected to each other.

  Here, the sleeve 42 has an axial length longer than that of the hollow roller 21, and the facing distance between the pair of annular plates 32 and 33 is regulated by the sleeve 42.

  In the formation of the cage 31 by using the bolt 40 as described above, since the welding work can be omitted, the cage 31 can be formed more easily and the cage 31 having excellent quality can be obtained. be able to. Further, since the convex nut 43 and the concave nut 45 can be held in a locked state by the wedge action due to the fitting of the tapered concave portion 46 and the tapered boss portion 44, the bolt 40 is not loosened and the shape retaining property is maintained. An excellent cage can be obtained.

  Furthermore, the convex nut 43 and the concave nut 45 can be removed by applying a large rotational torque, and the bolt 40 can also be removed by the removal, so that the maintenance of the cage 31 can be made possible.

  In the example shown in FIGS. 9 to 11, a hexagon bolt 50 is employed as the pin 34. In adopting the hexagon bolt 50, the screw shaft 51 of the hexagon bolt 50 is inserted from the pin hole 37 formed in the small diameter side annular plate 33 into the sleeve 42 inserted into the center hole 24 of the hollow roller 21. A bent piece formed in the washer 54 by screwing into a screw hole 53 provided in the large-diameter side annular plate 32 and incorporating a washer 54 between the head 52 of the hexagon bolt 50 and the small-diameter side annular plate 33. 55 is engaged with the outer peripheral surface of the small-diameter annular plate 33 to prevent rotation, and the claw 56 is engaged with the head 52 by bending the claw 56 formed on the outer periphery of the washer 54. The hexagon bolt 50 is prevented from rotating, and the pair of annular plates 32 and 33 are connected to each other.

  Here, FIG. 11 shows a state before the claw portion 56 is bent. In this state, the washer 54 is assembled, and after the hexagon bolt 50 is tightened, the claw portion 56 is bent.

  Even in the formation of the retainer 31 by adopting the hexagon bolt 50 as described above, the welding work can be made unnecessary, so that the retainer 31 can be formed more easily and has excellent quality. Can be obtained. Moreover, since the hexagon bolt 50 can be rotated and removed by releasing the engagement with the head 52 by bending back the claw portion 56 of the washer 54, the maintenance of the retainer 31 can be made possible.

  In the example shown in FIG. 12, a stepped pin 60 in which a small-diameter screw shaft portion 62 is provided at both ends of the straight shaft portion 61 is employed as the pin 34. In adopting the stepped pin 60, the stepped pin 60 is inserted from the pin hole 37 formed in the large-diameter side annular plate 32 or the small-diameter side annular plate 33 into the center hole 24 in the hollow roller 21, and the other stepped pin 60 is inserted. 8 is inserted into the pin hole 37 provided in the annular plate, and the screw shaft portion 62 located outward from the outer surface of each of the pair of annular plates 32 and 33 is shown in FIG. And the pair of annular plates 32 and 33 are connected to each other by tightening the nuts 43 and 45, respectively.

  In FIG. 13, one screw shaft portion 62 of the stepped pin 60 is screw-engaged with the screw hole 53 formed in the large-diameter side annular plate 32 and is screw-engaged with the right screw shaft portion 62 of FIG. The convex nut 43 and the concave nut 45 are omitted.

  Even when the stepped pin 60 as described above is used, since the welding work can be made unnecessary as in the case of using the bolts 40 and 50 shown in FIGS. 7 and 9, the cage 31 can be formed more easily. In addition, it is possible to obtain the cage 31 having excellent quality. Moreover, since the stepped pin 60 can be removed, the retainer 31 excellent in shape retaining property that enables maintenance can be obtained.

  In the embodiment, the tapered roller bearing is shown as the roller bearing. However, the roller bearing is not limited to the tapered roller bearing, and may be a cylindrical roller bearing.

1 outer ring 2 raceway surface 11 inner race 12 raceway surface 21 hollow roller 31 cage 32 annular plate 33 annular plate 34 pin 35 spacer 36 annular groove 37 pin hole 38 weld 40 bolt (pin)
41 Screw shaft portion 43 Convex nut 44 Boss portion 45 Concave nut 46 Concave portion 50 Hexagon bolt (pin)
51 Screw Shaft 52 Head 53 Screw Hole 54 Washer 55 Bending Piece 56 Claw 60 Stepped Pin 61 Straight Shaft 62 Screw Shaft

Claims (5)

A plurality of hollow rollers are assembled between the raceway surface formed on the inner periphery of the outer ring and the raceway surface formed on the outer periphery of the inner ring, the hollow rollers are held by a cage, and the cages are arranged on both sides of the hollow roller. In the roller bearing having a pair of the annular plates and a pin that is inserted through the center hole of the hollow roller and connects the pair of annular plates to each other,
The pin is inserted only into each of the center holes in several hollow rollers selected from the plurality of hollow rollers to connect the pair of annular plates to each other, and between the opposed portions of the adjacent hollow rollers in the circumferential direction. Incorporating a spacer whose both sides are arc surfaces along the outer periphery of the hollow roller ,
The pin is a bolt, and the screw shaft portion of the bolt is inserted into a hollow roller from a pin hole formed in one annular plate, and is inserted into a pin hole provided in the other annular plate, and the other annular shape A convex nut with a tapered boss at an eccentric position with respect to the center of the end surface at the tip of the screw shaft that protrudes outward from the outer surface of the plate, and a tapered recess at the center of the end surface A roller bearing comprising: a pair of annular plates coupled to each other by screw-engaging the recessed nut so that the tapered boss is fitted into the tapered recess. A plurality of hollow rollers are assembled between the raceway surface formed on the inner periphery of the outer ring and the raceway surface formed on the outer periphery of the inner ring, the hollow rollers are held by a cage, and the cages are arranged on both sides of the hollow roller. In the roller bearing having a pair of the annular plates and a pin that is inserted through the center hole of the hollow roller and connects the pair of annular plates to each other,
The pin is inserted only into each of the center holes in several hollow rollers selected from the plurality of hollow rollers to connect the pair of annular plates to each other, and between the opposed portions of the adjacent hollow rollers in the circumferential direction. Incorporating a spacer whose both sides are arc surfaces along the outer periphery of the hollow roller ,
The pin comprises a hexagonal bolt, and the screw shaft portion of the hexagonal bolt is inserted into the hollow roller from the pin hole formed in one annular plate and screwed into the screw hole provided in the other annular plate, A washer is assembled between the head of the bolt and the one annular plate, and a bent piece formed on the washer is engaged with the peripheral surface of the one annular plate to prevent rotation, and is formed on the outer periphery of the washer. by the claw portions of the bent-up, the claw portion engaged with the head, roller bearings, characterized in that the concatenation of the pair of annular plates. A plurality of hollow rollers are assembled between the raceway surface formed on the inner periphery of the outer ring and the raceway surface formed on the outer periphery of the inner ring, the hollow rollers are held by a cage, and the cages are arranged on both sides of the hollow roller. In the roller bearing having a pair of the annular plates and a pin that is inserted through the center hole of the hollow roller and connects the pair of annular plates to each other,
The pin is inserted only into each of the center holes in several hollow rollers selected from the plurality of hollow rollers to connect the pair of annular plates to each other, and between the opposed portions of the adjacent hollow rollers in the circumferential direction. Incorporating a spacer whose both sides are arc surfaces along the outer periphery of the hollow roller ,
The pin comprises a stepped pin having a small-diameter screw shaft portion provided at both ends of the straight shaft portion, and the stepped pin is inserted into a hollow roller from a pin hole formed in one annular plate. A taper-shaped boss portion is provided at an eccentric position with respect to the center of the end surface in each of the screw shaft portions that are inserted through the pin holes provided in the annular plate and outward from the outer side surfaces of the pair of annular plates. a convex nut, to a concave nut tapered recess formed on the center position of the end face, and engaged threaded engagement so that the tapered boss portion tapered recess is fitted to connect the pair of annular plates Roller bearing characterized by A plurality of hollow rollers are assembled between the raceway surface formed on the inner periphery of the outer ring and the raceway surface formed on the outer periphery of the inner ring, the hollow rollers are held by a cage, and the cages are arranged on both sides of the hollow roller. In the roller bearing having a pair of the annular plates and a pin that is inserted through the center hole of the hollow roller and connects the pair of annular plates to each other,
The pin is inserted only into each of the center holes in several hollow rollers selected from the plurality of hollow rollers to connect the pair of annular plates to each other, and between the opposed portions of the adjacent hollow rollers in the circumferential direction. Incorporating a spacer whose both sides are arc surfaces along the outer periphery of the hollow roller ,
The pin comprises a stepped pin having a small-diameter screw shaft portion provided at both ends of the straight shaft portion, and the stepped pin is inserted into a hollow roller from a pin hole formed in one annular plate. A threaded engagement with a screw hole provided in the annular plate, and a screw shaft portion located outward from the outer surface of the one annular plate, and a convex boss portion provided in a tapered position with respect to the center of the end surface wherein a nut, that the concave nut tapered recess formed on the center position of the end face, and engaged threaded engagement so that the tapered boss portion tapered recess is fitted to connect the pair of annular plates to roller bearings. The roller bearing according to any one of claims 1 to 4, wherein protrusions provided at both axial ends of the spacer are fitted in annular grooves formed on opposing surfaces of the pair of annular plates.

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